package face.util;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

public class ImageBase64 {

	/**
	 * @Description: 将base64编码字符串转换为图片
	 * @Author:
	 * @CreateTime:
	 * @param imgStr
	 *        base64编码字符串
	 * @param path
	 *        图片路径-具体到文件
	 * @return
	 */
	public static boolean generateImage(String imgStr, String path) {
	    if (imgStr == null){ 
		  return false;
	    }
		 BASE64Decoder decoder = new BASE64Decoder();
		 
		 // 解密
		byte[] b;
		try {
			 b = decoder.decodeBuffer(imgStr);
			 // 处理数据
			 for (int i = 0; i < b.length; ++i) {
			    if (b[i] < 0) {
			            b[i] += 256;
			 }
			 }
			 OutputStream out = new FileOutputStream(path);
			 out.write(b);
			 out.flush();
			 out.close();
			 return true;
		} catch (IOException e) {
			e.printStackTrace();
			return false;
		}
		 
	}
 
	/**
	 * @Description: 根据图片地址转换为base64编码字符串
	 * @Author: 
	 * @CreateTime: 
	 * @return
	 */
	public static String getImageStr(String imgFile) {
	    InputStream inputStream = null;
	    byte[] data = null;
	    try {
	        inputStream = new FileInputStream(imgFile);
	        data = new byte[inputStream.available()];
	        inputStream.read(data);
	        inputStream.close();
	    } catch (IOException e) {
	        e.printStackTrace();
	    }
	    // 加密
	    BASE64Encoder encoder = new BASE64Encoder();
	    return encoder.encode(data);
	}
	
	public static void main(String[] args) {
	    String strImg = getImageStr("C:\\Users\\Administrator\\Pictures\\20170330134958.jpg");
	    System.out.println(strImg);
	    generateImage(strImg, "C:\\Users\\Administrator\\Pictures\\20170330134959.jpg");
	}
}
